mirror of
https://git.0x0.st/mia/0x0.git
synced 2024-11-09 11:48:59 -05:00
366 lines
10 KiB
Python
Executable file
366 lines
10 KiB
Python
Executable file
#!/usr/bin/env python3
|
|
# -*- coding: utf-8 -*-
|
|
|
|
"""
|
|
Copyright © 2020 Mia Herkt
|
|
Licensed under the EUPL, Version 1.2 or - as soon as approved
|
|
by the European Commission - subsequent versions of the EUPL
|
|
(the "License");
|
|
You may not use this work except in compliance with the License.
|
|
You may obtain a copy of the license at:
|
|
|
|
https://joinup.ec.europa.eu/software/page/eupl
|
|
|
|
Unless required by applicable law or agreed to in writing,
|
|
software distributed under the License is distributed on an
|
|
"AS IS" basis, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
|
|
either express or implied.
|
|
See the License for the specific language governing permissions
|
|
and limitations under the License.
|
|
"""
|
|
|
|
from flask import Flask, abort, make_response, redirect, request, send_from_directory, url_for, Response, render_template
|
|
from flask_sqlalchemy import SQLAlchemy
|
|
from flask_migrate import Migrate
|
|
from jinja2.exceptions import *
|
|
from jinja2 import ChoiceLoader, FileSystemLoader
|
|
from hashlib import sha256
|
|
from magic import Magic
|
|
from mimetypes import guess_extension
|
|
import sys
|
|
import requests
|
|
from validators import url as url_valid
|
|
from pathlib import Path
|
|
|
|
app = Flask(__name__, instance_relative_config=True)
|
|
app.config.update(
|
|
SQLALCHEMY_TRACK_MODIFICATIONS = False,
|
|
PREFERRED_URL_SCHEME = "https", # nginx users: make sure to have 'uwsgi_param UWSGI_SCHEME $scheme;' in your config
|
|
MAX_CONTENT_LENGTH = 256 * 1024 * 1024,
|
|
MAX_URL_LENGTH = 4096,
|
|
USE_X_SENDFILE = False,
|
|
FHOST_USE_X_ACCEL_REDIRECT = True, # expect nginx by default
|
|
FHOST_STORAGE_PATH = "up",
|
|
FHOST_MAX_EXT_LENGTH = 9,
|
|
FHOST_EXT_OVERRIDE = {
|
|
"audio/flac" : ".flac",
|
|
"image/gif" : ".gif",
|
|
"image/jpeg" : ".jpg",
|
|
"image/png" : ".png",
|
|
"image/svg+xml" : ".svg",
|
|
"video/webm" : ".webm",
|
|
"video/x-matroska" : ".mkv",
|
|
"application/octet-stream" : ".bin",
|
|
"text/plain" : ".log",
|
|
"text/plain" : ".txt",
|
|
"text/x-diff" : ".diff",
|
|
},
|
|
FHOST_MIME_BLACKLIST = [
|
|
"application/x-dosexec",
|
|
"application/java-archive",
|
|
"application/java-vm"
|
|
],
|
|
FHOST_UPLOAD_BLACKLIST = None,
|
|
NSFW_DETECT = False,
|
|
NSFW_THRESHOLD = 0.608,
|
|
URL_ALPHABET = "DEQhd2uFteibPwq0SWBInTpA_jcZL5GKz3YCR14Ulk87Jors9vNHgfaOmMXy6Vx-",
|
|
)
|
|
|
|
if not app.config["TESTING"]:
|
|
app.config.from_pyfile("config.py")
|
|
app.jinja_loader = ChoiceLoader([
|
|
FileSystemLoader(str(Path(app.instance_path) / "templates")),
|
|
app.jinja_loader
|
|
])
|
|
|
|
if app.config["DEBUG"]:
|
|
app.config["FHOST_USE_X_ACCEL_REDIRECT"] = False
|
|
|
|
if app.config["NSFW_DETECT"]:
|
|
from nsfw_detect import NSFWDetector
|
|
nsfw = NSFWDetector()
|
|
|
|
try:
|
|
mimedetect = Magic(mime=True, mime_encoding=False)
|
|
except:
|
|
print("""Error: You have installed the wrong version of the 'magic' module.
|
|
Please install python-magic.""")
|
|
sys.exit(1)
|
|
|
|
db = SQLAlchemy(app)
|
|
migrate = Migrate(app, db)
|
|
|
|
class URL(db.Model):
|
|
id = db.Column(db.Integer, primary_key = True)
|
|
url = db.Column(db.UnicodeText, unique = True)
|
|
|
|
def __init__(self, url):
|
|
self.url = url
|
|
|
|
def getname(self):
|
|
return su.enbase(self.id)
|
|
|
|
def geturl(self):
|
|
return url_for("get", path=self.getname(), _external=True) + "\n"
|
|
|
|
def get(url):
|
|
u = URL.query.filter_by(url=url).first()
|
|
|
|
if not u:
|
|
u = URL(url)
|
|
db.session.add(u)
|
|
db.session.commit()
|
|
|
|
return u
|
|
|
|
class File(db.Model):
|
|
id = db.Column(db.Integer, primary_key = True)
|
|
sha256 = db.Column(db.String, unique = True)
|
|
ext = db.Column(db.UnicodeText)
|
|
mime = db.Column(db.UnicodeText)
|
|
addr = db.Column(db.UnicodeText)
|
|
removed = db.Column(db.Boolean, default=False)
|
|
nsfw_score = db.Column(db.Float)
|
|
|
|
def __init__(self, sha256, ext, mime, addr):
|
|
self.sha256 = sha256
|
|
self.ext = ext
|
|
self.mime = mime
|
|
self.addr = addr
|
|
|
|
def getname(self):
|
|
return u"{0}{1}".format(su.enbase(self.id), self.ext)
|
|
|
|
def geturl(self):
|
|
n = self.getname()
|
|
|
|
if self.nsfw_score and self.nsfw_score > app.config["NSFW_THRESHOLD"]:
|
|
return url_for("get", path=n, _external=True, _anchor="nsfw") + "\n"
|
|
else:
|
|
return url_for("get", path=n, _external=True) + "\n"
|
|
|
|
def store(file_, addr):
|
|
data = file_.read()
|
|
digest = sha256(data).hexdigest()
|
|
|
|
def get_mime():
|
|
guess = mimedetect.from_buffer(data)
|
|
app.logger.debug(f"MIME - specified: '{file_.content_type}' - detected: '{guess}'")
|
|
|
|
if not file_.content_type or not "/" in file_.content_type or file_.content_type == "application/octet-stream":
|
|
mime = guess
|
|
else:
|
|
mime = file_.content_type
|
|
|
|
if mime in app.config["FHOST_MIME_BLACKLIST"] or guess in app.config["FHOST_MIME_BLACKLIST"]:
|
|
abort(415)
|
|
|
|
if mime.startswith("text/") and not "charset" in mime:
|
|
mime += "; charset=utf-8"
|
|
|
|
return mime
|
|
|
|
def get_ext(mime):
|
|
ext = "".join(Path(file_.filename).suffixes[-2:])
|
|
gmime = mime.split(";")[0]
|
|
guess = guess_extension(gmime)
|
|
|
|
app.logger.debug(f"extension - specified: '{ext}' - detected: '{guess}'")
|
|
|
|
if not ext:
|
|
if gmime in app.config["FHOST_EXT_OVERRIDE"]:
|
|
ext = app.config["FHOST_EXT_OVERRIDE"][gmime]
|
|
else:
|
|
ext = guess_extension(gmime)
|
|
|
|
return ext[:app.config["FHOST_MAX_EXT_LENGTH"]] or ".bin"
|
|
|
|
f = File.query.filter_by(sha256=digest).first()
|
|
|
|
if f:
|
|
if f.removed:
|
|
abort(451)
|
|
else:
|
|
mime = get_mime()
|
|
ext = get_ext(mime)
|
|
f = File(digest, ext, mime, addr)
|
|
|
|
f.addr = addr
|
|
|
|
storage = Path(app.config["FHOST_STORAGE_PATH"])
|
|
storage.mkdir(parents=True, exist_ok=True)
|
|
p = storage / digest
|
|
|
|
if not p.is_file():
|
|
with open(p, "wb") as of:
|
|
of.write(data)
|
|
else:
|
|
p.touch()
|
|
|
|
if not f.nsfw_score and app.config["NSFW_DETECT"]:
|
|
f.nsfw_score = nsfw.detect(p)
|
|
|
|
db.session.add(f)
|
|
db.session.commit()
|
|
return f
|
|
|
|
|
|
|
|
class UrlEncoder(object):
|
|
def __init__(self,alphabet, min_length):
|
|
self.alphabet = alphabet
|
|
self.min_length = min_length
|
|
|
|
def enbase(self, x):
|
|
n = len(self.alphabet)
|
|
str = ""
|
|
while x > 0:
|
|
str = (self.alphabet[int(x % n)]) + str
|
|
x = int(x // n)
|
|
padding = self.alphabet[0] * (self.min_length - len(str))
|
|
return '%s%s' % (padding, str)
|
|
|
|
def debase(self, x):
|
|
n = len(self.alphabet)
|
|
result = 0
|
|
for i, c in enumerate(reversed(x)):
|
|
result += self.alphabet.index(c) * (n ** i)
|
|
return result
|
|
|
|
su = UrlEncoder(alphabet=app.config["URL_ALPHABET"], min_length=1)
|
|
|
|
def fhost_url(scheme=None):
|
|
if not scheme:
|
|
return url_for(".fhost", _external=True).rstrip("/")
|
|
else:
|
|
return url_for(".fhost", _external=True, _scheme=scheme).rstrip("/")
|
|
|
|
def is_fhost_url(url):
|
|
return url.startswith(fhost_url()) or url.startswith(fhost_url("https"))
|
|
|
|
def shorten(url):
|
|
if len(url) > app.config["MAX_URL_LENGTH"]:
|
|
abort(414)
|
|
|
|
if not url_valid(url) or is_fhost_url(url) or "\n" in url:
|
|
abort(400)
|
|
|
|
u = URL.get(url)
|
|
|
|
return u.geturl()
|
|
|
|
def in_upload_bl(addr):
|
|
if app.config["FHOST_UPLOAD_BLACKLIST"]:
|
|
with app.open_instance_resource(app.config["FHOST_UPLOAD_BLACKLIST"], "r") as bl:
|
|
check = addr.lstrip("::ffff:")
|
|
for l in bl.readlines():
|
|
if not l.startswith("#"):
|
|
if check == l.rstrip():
|
|
return True
|
|
|
|
return False
|
|
|
|
def store_file(f, addr):
|
|
if in_upload_bl(addr):
|
|
return "Your host is blocked from uploading files.\n", 451
|
|
|
|
sf = File.store(f, addr)
|
|
|
|
return sf.geturl()
|
|
|
|
def store_url(url, addr):
|
|
if is_fhost_url(url):
|
|
abort(400)
|
|
|
|
h = { "Accept-Encoding" : "identity" }
|
|
r = requests.get(url, stream=True, verify=False, headers=h)
|
|
|
|
try:
|
|
r.raise_for_status()
|
|
except requests.exceptions.HTTPError as e:
|
|
return str(e) + "\n"
|
|
|
|
if "content-length" in r.headers:
|
|
l = int(r.headers["content-length"])
|
|
|
|
if l < app.config["MAX_CONTENT_LENGTH"]:
|
|
def urlfile(**kwargs):
|
|
return type('',(),kwargs)()
|
|
|
|
f = urlfile(read=r.raw.read, content_type=r.headers["content-type"], filename="")
|
|
|
|
return store_file(f, addr)
|
|
else:
|
|
abort(413)
|
|
else:
|
|
abort(411)
|
|
|
|
@app.route("/<path:path>")
|
|
def get(path):
|
|
path = Path(path.split("/", 1)[0])
|
|
sufs = "".join(path.suffixes[-2:])
|
|
name = path.name[:-len(sufs) or None]
|
|
id = su.debase(name)
|
|
|
|
if sufs:
|
|
f = File.query.get(id)
|
|
|
|
if f and f.ext == sufs:
|
|
if f.removed:
|
|
abort(451)
|
|
|
|
fpath = Path(app.config["FHOST_STORAGE_PATH"]) / f.sha256
|
|
|
|
if not fpath.is_file():
|
|
abort(404)
|
|
|
|
if app.config["FHOST_USE_X_ACCEL_REDIRECT"]:
|
|
response = make_response()
|
|
response.headers["Content-Type"] = f.mime
|
|
response.headers["Content-Length"] = fpath.stat().st_size
|
|
response.headers["X-Accel-Redirect"] = "/" + str(fpath)
|
|
return response
|
|
else:
|
|
return send_from_directory(app.config["FHOST_STORAGE_PATH"], f.sha256, mimetype = f.mime)
|
|
else:
|
|
u = URL.query.get(id)
|
|
|
|
if u:
|
|
return redirect(u.url)
|
|
|
|
abort(404)
|
|
|
|
@app.route("/", methods=["GET", "POST"])
|
|
def fhost():
|
|
if request.method == "POST":
|
|
sf = None
|
|
|
|
if "file" in request.files:
|
|
return store_file(request.files["file"], request.remote_addr)
|
|
elif "url" in request.form:
|
|
return store_url(request.form["url"], request.remote_addr)
|
|
elif "shorten" in request.form:
|
|
return shorten(request.form["shorten"])
|
|
|
|
abort(400)
|
|
else:
|
|
return render_template("index.html")
|
|
|
|
@app.route("/robots.txt")
|
|
def robots():
|
|
return """User-agent: *
|
|
Disallow: /
|
|
"""
|
|
|
|
@app.errorhandler(400)
|
|
@app.errorhandler(404)
|
|
@app.errorhandler(411)
|
|
@app.errorhandler(413)
|
|
@app.errorhandler(414)
|
|
@app.errorhandler(415)
|
|
@app.errorhandler(451)
|
|
def ehandler(e):
|
|
try:
|
|
return render_template(f"{e.code}.html", id=id), e.code
|
|
except TemplateNotFound:
|
|
return "Segmentation fault\n", e.code
|